public class Test {
    /*public static void main(String[] args) {
        String str3 = "123";
        int ret = Integer.parseInt(str3);
        System.out.println(ret);
    }*/
   /* public static void main(String[] args) {
        int c = 20;
        int d = 7;
        System.out.println("c = "+c +", d = "+d);
        System.out.println(c+d +" hello");//27 hello
        System.out.println("hello"+c+d);//hello207
        System.out.println("hello"+(c+d));//hello27

    }*/
    public static void main(String[] args) {
        byte b = (byte)128;
        System.out.println(b);
    }
}
    /* public static void main(String[] args) {
         int a = 1;
         long b = 10;
         int c = 2;
         long d = 20;
         b = a;
         //c = d;
         System.out.println(b);
         System.out.println(c);

     }*/
   /*public static void main(String[] args) {
      int a = 6;
      long b = 66L;
      b=a;//6  a的范围小于b，编译器会自动将a提升为long类型，然后赋值
      a=b;
      System.out.println(a);
   }
}*/
   /* public static void main(String[] args) {
        byte a1 = 66;//66 编译通过，66在byte的范围内，编译器会将66转换为byte
        //byte a2 = 666;
        System.out.println(a1);
    }*/
   /* public static void main(String[] args) {
        float a = 1.1F;
        double b = 100.1;
        a = (float)b;
        System.out.println(a);
    }*/
    /*public static void main(String[] args) {
        int d = 2;
        double m= 3.4;
        d = (int)m;
        System.out.println(d);
    }*/
    /*public static void main(String[] args) {
        byte c = (byte)129;
        System.out.println(c);
    }*/
    /*public static void main(String[] args) {
        boolean flag = true;
        int a = 2;
        a = flag;
        System.out.println(a);
    }*/
    /*public static void main(String[] args) {
        int a = 10;
        long b = 100L;
        long c = a+b; //编译成功，a+b=int+long-->long+long
        int d = a+b;
        System.out.println(d);
    }*/
    /*public static void main(String[] args) {
        byte a = 1;
        byte b = 2;
        byte c = a+b;
        System.out.println(c);
    }*/
  /*  public static void main(String[] args) {
        byte a = 2;
        byte b = 3;
        byte c = (byte)(a+b);
        System.out.println(c);
    }*/
    /*public static void main(String[] args) {
        String s1 = "hahaha";
        String s2 = "lalala";
        System.out.println(s1);
        System.out.println(s2);
        System.out.println(s1+s2);
    }*/
    /*int a = 10;
    String str = String.valueOf(a);//ctr+鼠标的左键
        System.out.println(str);
    String str2 = a+"";//当字符串和其他类型进行相加的时候，结果就是字符串
        System.out.println(str2);
        System.out.println("==========");
    int c = 10;
    int d = 20;
    //System.out.println("c = "+c +", d = "+d);
        System.out.println(c+d +" hello");//30 hello
        System.out.println("hello"+c+d);//hello1020
        System.out.println("hello"+(c+d));//hello30

        System.out.println("==========");

    String str3 = "12345";
    int ret = Integer.parseInt(str3);
        System.out.println(ret);*/
   /* int n = 10;
    //方法一
    String s1 = n + "";//当字符串和其他类型进行相加的时候，结果就是字符串
    //方法二
    String s2 = String.valueOf(n);*/
   /* String s = "100";
    int n = Integer.parseInt(s);*/
    /*public static void main(String[] args) {
        int a = 10;
        String s1 = String.valueOf(a);
        System.out.println(s1);
        String s2 = a+"";//当字符串和其他类型进行相加的时候，结果就是字符串
        System.out.println(s2);
    }
}
}
     */